Process of extracting turpentine and rosin.



B. F. A. SAYLOR. v PROCESS OF EXTRAGTING TURPENTINE AND ROSIN.

APPLICATION FILED APR.1B, 1908.

Patented J an. e, 1910.

2 0ibm-c we 6 UNITED STATES PKTENT OFFICE.

BENJAMIN F. SAYLOR, OF ROME, GEORGIA, ASSIGNOR TO STANDARD TURPENTINE-AND PULP COMPANY, OF ATLANTA, GE'DRGIA, A CORPORATION-OF ARIZONA TEE--arromr.

rnocnss or EXTRACTING TURPENTINE AND Rosin.

Application filed April 18, 1908. Serial No. 427,841.

To all whom it may concern:

Be it known that I, BEN Jams F. A. SAY- Lon, a citizen of the UnitedStates, residing at Rome, in the county of Floyd and State of Georgia,have invented certain new and useful Improvements in Processes ofExtracting Turpentine and Rosin; and-I do hereby declare the followingtobe a full, clear, and exact description of the invention,

fsuch as will enable others skilled in the art to which it appertains tomake and use the same.

My invention relates to improvements in processes for extractingturpentine and rosin rom resinous woods containing the same.

The prima object of my invention is a process where y turpentine androsin may be extracted from wood in a more economical and expeditiousmanner than previously, and whereby resins and turpenes may be producedin a better and purer state than formerly.

In carrying out my invention, I use a strong steel cylinder with acapacity of three or more cords of wood. This cylinder is provided withan opening fourteen inches in-diameter near the top thereofarranged insuch a manner that the cylinder is steam and air-tight when closed. Atthe bottom of the cylinder there is a valve in a short discharge pipeabout two inches in diameter through which pipe the resinous substancesare withdrawn after they are extracted from the wood, as hereinafterdescribed. In the bottom of the cylinder, near the discharge pipe, isalarge opening about fourteen inches in diameter, ordinarily closed by amanhole lvalve through which of condensation. The cylinder is placed inan upri ht or sli htly inclined position, su rted %y a stee? framefastened to or in a hseof concrete, and is also provided withconnections which lead to a vacuum pipes In carrying out In process,Icharge the cylinder with-chip's, s ivers, or blocks of pine troduceinto the cylinder a light hydrocaror other resin producing woods. I thenin- Specification of Letters Patent. Patented J an. 4, 1910. I

hon, such as gasolene or benzin, preferably gasolene, insufficientquantities to thoroughly submerge the Wood in the cylinder.The wood is soaked in the hydrocarbon for about an hour and then theexcess of hydrocarbon is allowed to flow off. Small quantities of steamor hot water, at a tempera; ture about 212 F., are-then introduced intothe jacket of the cylinder and the vacuum pump is started. This vacuumpump is kept in operation long enough to produce avacuum correspondingto about 27 inches of mercury, (that is, leaving a pressure of aboutone-tenth of an atmosphere) which usually requires about 20 minutes,with the apparatus proportioned as in the drawing. During this time, theinterior of the cylinder does not become heated to an extent sufficientto vaporizeany appreciable amount of the gasolene, and even ifconsiderable quantities of the gasolene were vaporized, it would notmaterially affect the ultimate result. The vacuum pump is then stoppedand all openings into the cylinder closed,-

and opening the pores of the wood and attacking and dissolving out theresinous substances contained therein, and the heat has the effect ofcompleting this action, whereby the resinous matter is thoroughly dis-,solved and freed from the wood. Complete solution and separation of theresinous substances from the wood take place within about two hours fromthe time the heat is applied to theclcsed cylinder, thus effecting thesaving of several hours in the operation over any other process known tome. Hot

air or hot water at a temperature of about 200 F. and at a pressureconsiderably greater than the pressure in the cylinder, is then forcedinto the c linder through a valve in the top and this has the effect ofdriving down the resinous substances to the bottom and freeing the woodfrom any resinous matter adhering thereto. By thus treating the chargeat a low heat and freed from and well-known methods ofdistillation.

\ trates an apparatus for carrying out my opening 5 in its top, throughwhich the ma- .been removed. For the same reason the resthe resinousmatter and turpentine contained in them separated, leaving thehydrocarbon sel p is for the purpose of collecting any an ordinary worm'0, which runs throu a condensing drum 'w andd scharges into areceptacle a2.

atmospheric influences, I obtain the result that the fiber of the woodis uninjured and is in good condition for the manufacture of wood pulpafter the resinous substances have inous matter is obtained in almost asure a condition as that obtained by the dip method in'vogue for manyyears by boxing trees. ,After having obtained the resinous substances, Ithen treat them by the ordinary The hydrocarbons withdrawn in the firststep of the process are also redistilled, and

in a condition to be used a second time; In the accompanying drawing,which illusinvention, the figure represents said apparatus in crosssection, partly in elevation, the supports being omitted.

a is the steel cylinder, provided with an terial' to be treated is fedinto the cylinder, which openin is'usually closed by the cover 0,removably astened thereto.

(i represents the discharge pipe for the resinous material at the bottomof thecylin der. The cylinder is provided with a manhole opening 6,through which the material after treatment is drawn out, which manholeis ordinarily closed bya cover f. g represents the steam jacket, h, thevalved steam pipe leading thereinto, the pressure age; is, the escapevalve, and m, the valved ischarge pipe for the water of condensation.- nis the pipe for introducing air and hot water to the cylinder, 0, a pipeleading into a closed vessel 7), which is connected by a pipe 9 with thevacuum pump 1'. The vesvapors that may be sucked out of the cylinder aby the pump, and this vessel is providedwith a valved discharge pipe 8.a

' t is an ordinary still provided with a' steam coil u and havingconnected to its top y is a valved'pipe connecting the still t with thepipe d.

I claim l. The process of extracting turpentine and rosin from resinouswoods, which consists in subjecting the wood in a closed vessel, to theaction of a light hydrocarbon until the wood is thoroughly saturatedtherewith, then withdrawing the excess of hydrocarbon, then establishinga partial vacuum in said vessel, then subjecting said vessel toamoderate heat, and, finally, separating from the wood the resinousmatter adhering thereto by mechanical means, substantially as described.

2. The process of extracting turpentine and rosin from resinous woods,which con sists in comminutin said woods, soaking the same with a lightvessel, removing the excess of the hydrocarbon, establishing a partialvacuum in said vessel, subjectin said vessel to a heat not exceeding 212p the top of said vessel to free the wood from ydrocarbon in a closedintroducing a fluid into resinous matter adhering thereto, collectingtheresinous matters extracted from the Wood, and separating theturpentine and rosin from the resinous matters, substan- In testimonywhereof, I aflix my sigmature, in presence of two witnesses. BENJAMIN F.A. SAYLOR.

' Witnesses GEO. H. BYRNE,

R. M. 'PARKER;

